SOLVED tightening x-axis belt titan hybrid

Looking at the build guide it says to use a 2.5mm allan wrench right below the y endstop, but my x carriage does not have a hole there that I can see. Looking at the way I put the belt on it almost seems as if I have to somehow get to the grub screws which are vertical.

NM: found the right hole on the opposite side of the carriage...looks like docs need to be updated for this step.